S21 (ZVV)

The S21 is a regional railway service of the Zürich S-Bahn of the Zürcher Verkehrsverbund (ZVV). The service operates at peak hours between Regensdorf-Watt and Zürich Hauptbahnhof over the Wettingen–Effretikon railway, supplementing the regular S6 service, which continues west to Baden.

S21
Trainset at Zürich HB
Overview
LocaleZürich, Switzerland
Termini
Stations5
Service
TypeS-Bahn
SystemZürich S-Bahn
Operator(s)Zürcher Verkehrsverbund (ZVV)
Rolling stock
  • Re 450 and double-decker coaches
  • Re 420 (LION) locomotives and double-decker coaches
History
Opened13 December 2015 (2015-12-13)
Technical
Track gauge1,435 mm (4 ft 8+12 in) standard gauge
map_name

time
(h)
0:00
Regensdorf-Watt
0:03
Zürich Affoltern
(limited service)
0:12
Zürich Oerlikon
Käferberg Tunnel (2.12 km)
0:16
Zürich Hardbrücke
0:22
Zürich HB
  1. Zürich HB tracks (Gleis) from left to right: 21–22 (SZU) / 31–34 / 3–18 (surface) / 41–44.

At Zürich HB, trains of the S21 service usually depart from ground-level track (Gleis) 18.

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